DeFelsko POSITECTOR RTR Bedienungsanleitung

Quick Guide v. 1.0

Replica Tape Reader

Introduction

The PosiTector Replica Tape Reader (RTR) is a hand-held

electronic instrument that measures burnished Testex Press-O-

FilmT replica tape to produce peak-to-valley surface profile height

measurements. It consists of a body (Standard or Advanced) and

probe.

This Quick Guide summarizes the basic functions of the Gage.

Download the full instruction manual at: defelsko.com/manuals

Quick Start

The PosiTector RTR powers-up when the center navigation

button is pressed. To preserve battery life, the Gage powers

down after approximately 5 minutes of no activity. All settings are

retained.

Down

Center

To navigate, use the Up and Down buttons to

scroll and to SELECT.

Select Exit to exit from any menu.

Navigation Button

The center button is purposely recessed to help

eliminate unintentional powering-up of the Gage.

Menu Operation

Gage functions are menu controlled. To access the enu, power-

up the Gage, then press the center navigation button.

NOTE:

To ensure best accuracy, the user will be required to zero

the probe every time the Gage is powered-up. It is therefore a

good idea to clean the probe regularly with the included cleaning

card. Cleaning is best performed when the Gage is powered down.

NOTE:

With the Gage powered down...

1. Clean the probe with the included cleaning card. (pg. 5)

2. Power-up Gage by pressing the center navigation button.

3. Zero the probe. (pg. 6)

4. easure the included check shim to verify accuracy (pg. 5)

5. easure the burnished replica tape (pg. 4)

Probes

To disconnect a probe from a body, power-down the

Gage and slide the plastic probe connector horizontally

(in the direction of the arrow) away from the body.

Reverse these steps to attach a new probe.

When powered-up, the PosiTector automatically

determines which probe is attached and does a

self-check.

Press-O-Film Replica Tape

Additionally, the PosiTector accepts a number of probe types

including magnetic, eddy current and ultrasonic coating thickness,

surface profile, environmental and ultrasonic wall thickness

probes.

For the latest information on probe interchangeability, see

www.defelsko.com/probes

Press-O-Film provides a simple way to obtain an impression of a

surface for analysis. It consists of a layer of crushable plastic micro

foam affixed to a 50.8 µm (2 mil) incompress-

ible polyester film. When compressed against

a roughened surface, the foam collapses and

acquires an accurate impression, or reverse

replica, of the surface. It is available in a number of grades to

accommodate measurements in different profile ranges.

Placing the compressed tape (replica) into the PosiTector RTR

gives a measure of the average maximum peak-to-valley height of

the surface roughness profile. The Gage automatically subtracts

the thickness of the polyester substrate from all measurements.

How to Measure

Prepare the test surface

Burnish the replica tape (create a replica)

1. Prepare the test surface

2. Burnish the replica tape

3. Prepare the Gage

4. easure

Locate a representative site for measurement.

Clean the surface to be tested. DeFelsko

recommends the use of the included putty to

remove dust, debris, or residual blast media from

the surface. Firmly press the putty onto the surface

using your fingers, and remove.

Select the appropriate grade of replica tape based on the target

profile. See tape instructions for assistance.

Pull a single adhesive-backed replica tape free of its release

paper. A “bull’s eye” circle of paper should remain on the release

paper (it is not used for measurement).

Apply replica tape to blasted surface. Press the

adhesive-backed ends of the paper to hold it firmly

in place during the burnishing process.

Firmly compress replica film using the rounded end

of the included stainless steel burnishing tool.

Apply sufficient pressure in a circular and x-y

rubbing motion to produce a replica with a uniform

pebble grain appearance. It normally takes 30 to 60

seconds to fully compress all parts of the film on

most surfaces. In general, too much compression is

safer than too little. After burnishing is complete, remove the

replica tape from the surface.

Prepare the Gage

Measure

With the Gage powered-down, clean the measurement surfaces

using the included cleaning card. Swipe the card through the

opening a few times while firmly pressing both probe buttons to

remove dust particles and residual tape adhesive.

Power-up the Gage by pressing the center navigation

button. An image appears indicating that the probe

requires zeroing.

Simultaneously press and hold both probe buttons firmly until the

Gage beeps and the arrows point outward. Do not place anything

in the measurement opening during this procedure.

easure the included check shim to verify accuracy (pg. 5).

Ensure the correct grade of replica tape, C or XC, is displayed in

the upper left corner of the LCD (pg. 6).

Insert the burnished replica tape into the

measurement opening. Ensure the tape is

properly positioned so that the burnished region

is centered within the opening in the probe with

the adhesive (sticky) side down.

To position the tape, align the two dots (printed on replica tape)

with arrows on both sides of the measurement opening.

Align dots with

arrows on probe

If you are using older tape that does not have the printed dots,

simply align by centering the tape within the measurement

opening.

Once positioned, firmly press both probe buttons simultaneously

and hold until the Gage beeps and the measurement is displayed.

During measurement, a constant anvil pressure is applied to the

replica tape regardless of how hard the two buttons are pressed.

The Gage automatically subtracts the 50.8 µm (2 mil) of

incompressible polyester film. No further adjustments are required.

Verification of Accuracy

Gage accuracy is verified using the included check shim.

Ensure that the probe has been cleaned with the included

cleaning card (above) and that the probe has been zeroed (pg. 6).

Place the check shim into the measurement opening. The

average of several measurements should be within the combined

tolerance of both the Gage and the shim. If not, the Gage may

need to be returned to your dealer for service.

The check shim is specifically intended for the PosiTector RTR.

The Gage is designed to measure burnished replica tape within a

limited measuring range and automatically subtracts 50.8 µm (2 mil)

from height measurements to account for the incompressible

polyester film. Therefore plastic shims intended for other

instruments such as coating thickness gages will not be measured

properly.

Calibration

Gage calibration is typically performed by the manufacturer or

accredited lab. All probes include a Certificate of Calibration.

The probe contains two measuring surfaces that can become

contaminated with dust particles and residual tape adhesive. It is

therefore a good idea to clean the probe regularly with the included

cleaning card. Cleaning is essential prior to performing a probe

zero (pg. 6) or a verification of accuracy (pg. 5). It is best

performed when the Gage is powered down.

With the Gage powered-down, swipe the card through the opening

a few times while firmly pressing both probe buttons.

The card can also be used to clean the surfaces of analog spring

micrometers. Replacement cards are available from your dealer.

Cleaning Card

Calibration & Verification of Accuracy

Tape Grade

Cal Settings Menu

The probe should be zeroed regularly to ensure best accuracy.

The user will be required to zero the probe every time the Gage is

powered-up. The Zero menu item allows the procedure to be

performed at more regular intervals. It is particularly useful during

long measurement sessions.

Clean the probe with the included cleaning card (pg. 5) before

performing a probe zero.

1. Select Zero from the Cal Settings menu

2. Simultaneously press and hold both probe buttons firmly until

the Gage beeps and the arrows point outward. Do not place

anything in the measurement opening during this procedure.

Zero

Selects a replica tape grade. Required when Linearize mode (HL)

is ON.

C - Course

XC - Extra Course (default)

Simultaneously press and hold both probe buttons

firmly until the Gage beeps and displays “0”. This can be

performed from the main measurement screen without having to

access the menu.

Coarse inus and X-Coarse Plus grades are not

supported in Linearize mode since the only function of these two

grades is to improve upon the accuracy of C tape at its low end

and XC tape at its high end, something the PosiTector RTR will

automatically do when measuring HL. When Linearize mode is

OFF, the PosiTector RTR will measure all four grades of replica

tape just like a conventional spring micrometer.

NOTE:

SHORTCUT:

This is the default measurement mode. Linearize mode is ON

when this box is ticked and the "HL" appears on the display.

An undesirable characteristic of replica tape is that measurements

made with analog spring micrometers are most accurate near the

middle of each grade's range and least accurate at the outer ends

of each grade's range. That is why two other grades, Coarse

inus and X-Coarse Plus, are used to check and, if necessary,

adjust measurements at the lower and upper ends of the primary

range of 20 - 115 µm (0.8 - 4.5 mils).

Inside the primary range, the upper end of Coarse grade’s range

and the lower end of X-Coarse grade’s range share a 38 - 64 µm

(1.5 - 2.5 mil) "overlap" region. Current Testex instructions

describe a relatively complicated and time consuming procedure

(the average of one reading using Coarse grade and one reading

using X-Coarse grade) that is used to knit the Coarse and

X-Coarse sub-ranges together to achieve reasonably accurate

readings over the primary range. This method is a compromise

between accuracy and ease of use.

When the Linearize box is NOT ticked, the PosiTector RTR

displays a height value of H comparable to the value an analog

spring micrometer would display after the 50.8 µm (2 mil) of

incompressible polyester substrate has been subtracted. In other

words, it is the average of the maximum peak-to-valley distances

obtained by measuring the thickness of the replica tape without

any correction.

When the Linearize box IS ticked, the PosiTector RTR displays

a more accurate peak-to-valley height measurement HLthat has

been adjusted for the non-linearity of replica tape. There is no

need to average 2 or more replicas from different grades of tape

AND there is no need to subtract the 50.8 µm (2 mil) of

incompressible polyester substrate. Ensure the proper tape

grade, C or XC, has been selected (pg. 6) and appears in the

upper left corner of the display.

Linearize

During measurement, if the linearized measurement falls outside

of the selected tape grade's range, the Gage will suggest a more

suitable tape grade to perform the measurement.

Reset

Reset (soft reset) restores factory settings and returns the Gage to

a known condition. The following occurs:

- All batches, stored measurements, images, batch names and

screen captures are erased.

- enu settings are returned to the following:

Memory = OFF

Statistics = OFF

Memory Display = None

Bluetooth = OFF

WiFi = OFF

Perform a more thorough Hard Reset by powering down the

Gage, waiting several seconds, then simultaneously holding both

the center and (+) buttons until the Reset symbol

appears. This returns the Gage to a known, “out-of-the-box”

condition. It performs the same function as a menu Reset with the

addition of:

Date, Time and WiFi are not affected by either Reset.

Units = microns

Flip Display = Normal

White on Black = OFF

Language = English

Battery Type = Alkaline

Backlight = Normal

USB Drive= ON

Auto Sync = OFF

- Bluetooth Pairing info is cleared.

- enu settings are returned to the following:

Setup Menu

Tape Grade = XC

Linearize = ON

NOTE:

Selects the type of batteries used in the Gage from a choice of

“Alkaline”, “Lithium” or “Ni H” (Nickel-metal hydride

rechargeable). If Ni H is selected, the Gage will trickle charge the

batteries while connected via USB to a PC or optional AC charger.

The battery state indicator icon is calibrated for the selected

battery type. No damage will occur if the wrong battery type is

selected.

DeFelsko recommends the use of eneloo (Ni H)

rechargeable batteries.

Battery Type

NOTE:

A statistical summary will appear on the display. Remove the last

measurement by pressing the (-) button. Press (+) to clear

statistics.

Statistics

σStandard Deviation

inimum Value

Average

aximum Value

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